import { constantRoutes } from '@/router'
import { getMenuList } from '@/api/user'
import Layout from '@/layout'
/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
    if (route.meta && route.meta.roles) {
        return roles.some(role => route.meta.roles.includes(role))
    } else {
        return true
    }
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
    const res = []

    routes.forEach(route => {
        const tmp = { ...route }
        if (hasPermission(roles, tmp)) {
            //动态找到页面路径
            const component = tmp.component;
            if (route.component) {
                //判断是否是一级菜单
                if (component == 'Layout') {
                    tmp.component = Layout;
                } else {
                    tmp.component = (resolve) => require([`@/views${component}`], resolve)
                }
            }
            if (tmp.children) {
                tmp.children = filterAsyncRoutes(tmp.children, roles)
            }
            res.push(tmp)
        }
    })

    return res
}

const state = {
    routes: [],
    addRoutes: []
}

const mutations = {
    SET_ROUTES: (state, routes) => {
        state.addRoutes = routes
        state.routes = constantRoutes.concat(routes)
    }
}

const actions = {
    //获取路由数据
    generateRoutes({ commit }, roles) {
        return new Promise((resolve, reject) => {
            getMenuList().then(res => {
                let accessedRoutes;
                if (res.code == 200) {
                    accessedRoutes = filterAsyncRoutes(res.data, roles)
                }
                //把返回的数据存到vuex里面
                commit('SET_ROUTES', accessedRoutes)
                resolve(accessedRoutes)
            }).catch(error => {
                reject(error)
            })
        })
    }
    //   generateRoutes({ commit }, roles) {
    //     return new Promise(resolve => {
    //       let accessedRoutes
    //       if (roles.includes('admin')) {
    //         accessedRoutes = asyncRoutes || []
    //       } else {
    //         accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
    //       }
    //       commit('SET_ROUTES', accessedRoutes)
    //       resolve(accessedRoutes)
    //     })
    //   }
}

export default {
    namespaced: true,
    state,
    mutations,
    actions
}
